package zuoye11dao20;

public class lx19 {
	  public static void main(String[] args) {
	        int n = 4;
	        for (int i = 1; i <= n; i++) {
	            for (int j = 1; j <= n - i; j++) {
	                System.out.print(" ");
	            }
	            for (int k = 1; k <= 2 * i - 1; k++) {
	                System.out.print("*");
	            }
	            System.out.println();
	        }
	        for (int i = n - 1; i >= 1; i--) {
	            for (int j = 1; j <= n - i; j++) {
	                System.out.print(" ");
	            }
	            for (int k = 1; k <= 2 * i - 1; k++) {
	                System.out.print("*");
	            }
	            System.out.println();
	        }
	    }
}
